I may concertise you may concertise he may concertise we may concertise you may concertise they may concertise
V-ing form
I may be concertising you may be concertising he may be concertising we may be concertising you may be concertising they may be concertising
Perfect
I may have concertised you may have concertised he may have concertised we may have concertised you may have concertised they may have concertised
V-ing perfect
I may have been concertising you may have been concertising he may have been concertising we may have been concertising you may have been concertising they may have been concertising
Negation
Simple form
I mayn't concertise you mayn't concertise he mayn't concertise we mayn't concertise you mayn't concertise they mayn't concertise
V-ing form
I mayn't be concertising you mayn't be concertising he mayn't be concertising we mayn't be concertising you mayn't be concertising they mayn't be concertising
Perfect
I mayn't have concertised you mayn't have concertised he mayn't have concertised we mayn't have concertised you mayn't have concertised they mayn't have concertised
V-ing perfect
I mayn't have been concertising you mayn't have been concertising he mayn't have been concertising we mayn't have been concertising you mayn't have been concertising they mayn't have been concertising
Interrogative form
Simple form
may I concertise? may you concertise? may he concertise? may we concertise? may you concertise? may they concertise?
V-ing form
may I be concertising? may you be concertising? may he be concertising? may we be concertising? may you be concertising? may they be concertising?
Perfect
may I have concertised? may you have concertised? may he have concertised? may we have concertised? may you have concertised? may they have concertised?
V-ing perfect
may I have been concertising? may you have been concertising? may he have been concertising? may we have been concertising? may you have been concertising? may they have been concertising?
Interro-negative form
Simple form
mayn't I concertise? mayn't you concertise? mayn't he concertise? mayn't we concertise? mayn't you concertise? mayn't they concertise?
V-ing form
mayn't I be concertising? mayn't you be concertising? mayn't he be concertising? mayn't we be concertising? mayn't you be concertising? mayn't they be concertising?
Perfect
mayn't I have concertised? mayn't you have concertised? mayn't he have concertised? mayn't we have concertised? mayn't you have concertised? mayn't they have concertised?
V-ing perfect
mayn't I have been concertising? mayn't you have been concertising? mayn't he have been concertising? mayn't we have been concertising? mayn't you have been concertising? mayn't they have been concertising?